Tools & Wizards About Us
szdc.cz screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

szdc.cz

Správa železnic, státní organizace - www.spravazeleznic.cz

Page Load Speed

7 sec in total

First Response

789 ms

Resources Loaded

6 sec

Page Rendered

231 ms

szdc.cz screenshot

About Website

Click here to check amazing Szdc content for Czech Republic. Otherwise, check out these important facts you probably never knew about szdc.cz

Správa železnic, státní organizace

Visit szdc.cz

Key Findings

We analyzed Szdc.cz page load time and found that the first response time was 789 ms and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

szdc.cz performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.5 s

0/100

25%

SI (Speed Index)

Value15.6 s

0/100

10%

TBT (Total Blocking Time)

Value350 ms

73/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value14.8 s

8/100

10%

Network Requests Diagram

szdc.cz

789 ms

www.spravazeleznic.cz

1214 ms

aui.css

107 ms

main.css

215 ms

main.css

305 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Szdc.cz, 90% (75 requests) were made to Spravazeleznic.cz and 4% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Spravazeleznic.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.0 MB (75%)

Content Size

17.3 MB

After Optimization

4.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Szdc.cz main page is 17.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 16.5 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 222.1 kB

  • Original 250.7 kB
  • After minification 173.2 kB
  • After compression 28.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 77.5 kB, which is 31% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 222.1 kB or 89% of the original size.

Image Optimization

-77%

Potential reduce by 12.8 MB

  • Original 16.5 MB
  • After minification 3.7 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Szdc needs image optimization as it can save up to 12.8 MB or 77% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-7%

Potential reduce by 33.2 kB

  • Original 450.0 kB
  • After minification 450.0 kB
  • After compression 416.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-2%

Potential reduce by 2.2 kB

  • Original 104.0 kB
  • After minification 104.0 kB
  • After compression 101.8 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Szdc.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 56 (70%)

Requests Now

80

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Szdc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

szdc.cz

szdc.cz

789 ms

www.spravazeleznic.cz

www.spravazeleznic.cz

1214 ms

aui.css

aui.css

107 ms

main.css

main.css

215 ms

main.css

main.css

305 ms

main.css

main.css

307 ms

main.css

main.css

322 ms

main.css

main.css

323 ms

main.css

main.css

327 ms

main.css

main.css

326 ms

barebone.jsp

barebone.jsp

719 ms

main.js

main.js

423 ms

main.js

main.js

497 ms

main.js

main.js

456 ms

navigation.js

navigation.js

449 ms

main.css

main.css

1028 ms

szdc.css

szdc.css

532 ms

slick.css

slick.css

554 ms

slick-theme.css

slick-theme.css

569 ms

unite-gallery.css

unite-gallery.css

608 ms

jquery.min.js

jquery.min.js

758 ms

jquery-ui.min.js

jquery-ui.min.js

765 ms

slick.min.js

slick.min.js

683 ms

unitegallery.min.js

unitegallery.min.js

927 ms

ug-theme-compact.js

ug-theme-compact.js

806 ms

szdc.js

szdc.js

827 ms

js

js

61 ms

main.js

main.js

844 ms

main.js

main.js

871 ms

upload.js

upload.js

919 ms

main.js

main.js

923 ms

js

js

59 ms

analytics.js

analytics.js

19 ms

collect

collect

12 ms

fbevents.js

fbevents.js

66 ms

szdc-logo-barevne.svg

szdc-logo-barevne.svg

180 ms

szdc-logo-bile.svg

szdc-logo-bile.svg

179 ms

151 ms

symbol-sipka-vpravo-15-modra-svetla.svg

symbol-sipka-vpravo-15-modra-svetla.svg

141 ms

symbol-hledat-modra-tmava.svg

symbol-hledat-modra-tmava.svg

139 ms

symbol-facebook-seda.svg

symbol-facebook-seda.svg

142 ms

symbol-instagram-seda.svg

symbol-instagram-seda.svg

269 ms

9c1122b2-2f30-4e2d-8766-60772ce0f99f

9c1122b2-2f30-4e2d-8766-60772ce0f99f

271 ms

symbol-youtube-seda.svg

symbol-youtube-seda.svg

273 ms

symbol-linkedin-seda.svg

symbol-linkedin-seda.svg

272 ms

symbol-spotify-seda.svg

symbol-spotify-seda.svg

274 ms

landing

landing

177 ms

symbol-sipka-na-tlacitko-bila.svg

symbol-sipka-na-tlacitko-bila.svg

254 ms

cfa98255-a9b4-432f-86e7-b38548ea918f

cfa98255-a9b4-432f-86e7-b38548ea918f

703 ms

0f1a405f-0591-4a54-913d-4837b5d0d488

0f1a405f-0591-4a54-913d-4837b5d0d488

1192 ms

a36e8c35-aed2-4ac7-9f32-4b31dc7f6895

a36e8c35-aed2-4ac7-9f32-4b31dc7f6895

851 ms

7877983a-023d-419e-adc3-df54724ef100

7877983a-023d-419e-adc3-df54724ef100

746 ms

aaf08842-bcee-43d1-a2bb-546f5a63e170

aaf08842-bcee-43d1-a2bb-546f5a63e170

997 ms

bf2e21cc-28a5-44e2-bee1-8984409201ac

bf2e21cc-28a5-44e2-bee1-8984409201ac

1023 ms

8bce443f-88ea-41ea-b0c8-a6cce8a0964e

8bce443f-88ea-41ea-b0c8-a6cce8a0964e

973 ms

ajax-loader.gif

ajax-loader.gif

1772 ms

slider-active.svg

slider-active.svg

876 ms

slider.svg

slider.svg

1000 ms

symbol-sipka-vpravo-14-modra-svetla.svg

symbol-sipka-vpravo-14-modra-svetla.svg

1005 ms

98991e25-737c-41d3-9a9f-0d168fa76b42

98991e25-737c-41d3-9a9f-0d168fa76b42

1074 ms

symbol-sipka-na-tlacitko-modra-tmava.svg

symbol-sipka-na-tlacitko-modra-tmava.svg

1058 ms

symbol-sipka-na-tlacitko-modra-svetla.svg

symbol-sipka-na-tlacitko-modra-svetla.svg

1107 ms

symbol-sipka-na-tlacitko-oranzova.svg

symbol-sipka-na-tlacitko-oranzova.svg

1109 ms

97eeeade-696e-40c5-bdb7-4cb5682384e0

97eeeade-696e-40c5-bdb7-4cb5682384e0

1225 ms

7b2112ee-9d76-4c2f-8107-b6374ec18752

7b2112ee-9d76-4c2f-8107-b6374ec18752

1272 ms

symbol-telefon-bila.svg

symbol-telefon-bila.svg

1217 ms

symbol-cookie-bila.svg

symbol-cookie-bila.svg

1216 ms

symbol-prihlasit-bila.svg

symbol-prihlasit-bila.svg

1214 ms

symbol-mapa-webu-bila.svg

symbol-mapa-webu-bila.svg

2349 ms

symbol-pristupnost-bila.svg

symbol-pristupnost-bila.svg

2347 ms

slick.woff

slick.woff

2356 ms

js

js

64 ms

1600 ms

114 ms

114 ms

available_languages.jsp

available_languages.jsp

117 ms

108 ms

120 ms

113 ms

161 ms

115 ms

108 ms

szdc-print.css

szdc-print.css

111 ms

Accessibility Review

szdc.cz accessibility score

91

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

Low

No form fields have multiple labels

High

Image elements do not have [alt] attributes

Best Practices

szdc.cz best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

szdc.cz SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Szdc.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Szdc.cz main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

szdc.cz

Open Graph description is not detected on the main page of Szdc. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: